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tiff eurofins Lancaster Analysis Report Laboratories 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605-2425•717-656-2300 Fax:717-656-2681•www.lancasterlabs.com Pagel of 3 Quality Control Summary Client Name: Chevron Environmental Mgmt Co Group Number: 1292577 Reported: 04/05/12 at 04:09 PM Matrix QC may not be reported if insufficient sample or site-specific QC samples were not submitted. In these situations, to demonstrate precision and accuracy at a batch level, a LCS/LCSD was performed, unless otherwise specified in the method. All Inorganic Initial Calibration and Continuing Calibration Blanks met acceptable method criteria unless otherwise noted on the Analysis Report. Laboratory Compliance Quality Control _ Blank Blank Blank Report LCS LCSD LCS/LCSD Analysis Name Result LOQ** MDL Units %REC %REC Limits RPD RPD Max Batch number: B120611AB Sample number(s) : 6563925-6563926,6563928-6563929 Benzene N.D. 0.005 0.0005 mg/kg 95 93 80-120 2 30 Ethylbenzene N.D. 0.005 0.001 mg/kg 94 93 80-120 1 30 Toluene N.D. 0.005 0.001 mg/kg 94 93 80-120 1 30 Xylene (Total) N.D. 0.005 0.001 mg/kg 95 95 80-120 0 30 Batch number: R120701AA Sample number(s) : 6563927 Benzene N.D. 0.25 0.025 mg/kg 102 98 80-120 4 30 Ethylbenzene N.D. 0.25 0.050 mg/kg 92 89 80-120 4 30 Toluene N.D. 0.25 0.050 mg/kg 100 93 80-120 7 30 Xylene (Total) N.D. 0.25 0.050 mg/kg 94 91 80-120 4 30 Batch number: 12063SLA026 Sample number(s) : 6563925-6563929 Acenaphthene N.D. 0.0017 0.00067 mg/kg 87 73-104 Acenaphthylene N.D. 0.0017 0.00033 mg/kg 78 67-100 Anthracene N.D. 0.0017 0.00033 mg/kg 83 69-107 Benzo(a)anthracene N.D. 0.0017 0.00067 mg/kg 87 74-112 Benzo(a)pyrene N.D. 0.0017 0.00067 mg/kg 90 70-109 Benzo(b)fluoranthene N.D. 0.0017 0.00067 mg/kg 98 60-126 Benzo(g,h,i)perylene N.D. 0.0017 0.00067 mg/kg 93 66-130 Benzo(k)fluoranthene N.D. 0.0017 0.00067 mg/kg 85 65-130 Chrysene N.D. 0.0017 0.00033 mg/kg 88 79-111 Dibenz(a,h)anthracene N.D. 0.0017 0.00067 mg/kg 96 69-129 Fluoranthene N.D. 0.0017 0.00067 mg/kg 86 78-114 Fluorene N.D. 0.0017 0.00067 mg/kg 88 75-110 Indeno(1,2,3-cd)pyrene N.D. 0.0017 0.00067 mg/kg 95 53-128 1-Methylnaphthalene N.D. 0.0017 0.00067 mg/kg 83 72-114 2-Methylnaphthalene N.D. 0.0017 0.00067 mg/kg 77 62-115 Naphthalene N.D. 0.0017 0.00067 mg/kg 83 67-105 Phenanthrene N.D. 0.0017 0.00067 mg/kg 85 76-109 Pyrene N.D. 0.0017 0.00067 mg/kg 83 71-109 Batch number: 120650024A Sample number(s) : 6563925-6563929 C10-C36 N.D. 12. 4.0 mg/kg Total TPH N.D. 12. 4.0 mg/kg 74 64-122 Sample Matrix Quality Control Unspiked (UNSPK) = the sample used in conjunction with the matrix spike Background (BKG) = the sample used in conjunction with the duplicate MS MSD MS/MSD RPD BKG DUP DUP Dup RPD *-Outside of specification **-This limit was used in the evaluation of the final result for the blank (1)The result for one or both determinations was less than five times the LOQ. (2)The unspiked result was more than four times the spike added.